WAIT! This can’t possibly be true! Why, only yesterday there was a post about how BitCoin would make a GREAT world reserve currency!
GMTA! My exact thought when I saw this.
At some time there will be a viable crypto-currency, but BitCoin ain't it.
Bitcoin is still young. As it matures and becomes more widely adopted, a DDOS attack on an exchange will become more difficult (larger exchanges = better security), same as for fiat stock exchanges for example. And attacks on one exchange out of many will have less impact on price as it will be a nuisance.
This is a nuisance anyway, just happening at a particularly volatile time.